Pulverizing machine



E. H. ELZEMEYER ET AL.

PULVERIZING MACHINE Filed March Pecemefi Does 23,, 1%26.

EEWSTHH. ELZEMEZER AXE?) TP.&.UL 5;,

i fis .e- Fiisi i s mm'esfe, oe sex rooms, iimesooss.

zeonvsmcisxe immense- V Unitedstates, and residents ofthe city of St.Louis endStateof Missouri, have invented e new and useful Improvement inPulvei'izingvMachines, of which she follow" ingis a specification. v I mThis 'nvention relates to rotary pulverizing'machines; 121- theoperation of such me. chines, pieces of metal or exccedingiy'hardsubstances are sometimes fed. inzothe 7mm chine by accidentanciare'iishie to damage the sal ne. Another disadvantage is that suchmachine is liable to become choked es the result of overfeeding, whichnecessitates rho. removal of the compacted material to enable themachine to operate successfully. The principal object-of the presentinvention is to provide fez. the automatic discherg'eof such excess andforeign materieis which tend to damage the machine or'mien fer-e withthe operation thereof. fisher ob- .jects are simplicity and cheapness ofcon struction and compactness of: design.

The invention consists principally in e pulv'enzing machine whereinprovision 15 made for the automatic discharge 0% such excess of foreignmaterials; e' iki it also consists in vthe arrangements, andcomhimfcions of parts hereinefeei descsiheci encihcieimeri. In theaccompanying drawing, Wherem like numerals l'efflf jiq ilii parseWherever they occur,

Fig. 1 is a vei bicai iiensvci'se section through a gmiverizer pres dedwith an outmflitic disc arge embodying our invention, and

Fig. 2 is a ree elevation of she mechine,

partly in sectionl v Rci'errmg to the accompanying drawing, ourdevice/is illustrated 1n connectlon with a ulverizi'n machine com risin'en u cess 8 formed ineech sideweii of the casing 3, and a lowercasingi. he upper casing: 3 is provioieii with a chute or hopper 5thronghwhich the meteriei to he culverizeri is fed; anziche lowersection 4 as an open bottom though which the puivei'izeii *me'teriei isdischei gei. 'Thesicie'weiis oi" the iowei", casing 'eI'e-"provicie'iwith. soi'cahle bearing hoses 6 for i otetebiy ssppoarii'ng the 'encisoffihemein she-ft 7 v Meunied on the shaft ii,- in a. circuier reufl-VBSZ'iZBE, are circular enci. pistes o? iiisks 8 which are ccnnecici toeach other is?" series of ciicumfei'emieiiy speceoi rods 9.

Moimted on the'rods 9 ere grinding rings to receive the supporting rods9 and thus constitute supports for said rods. intermedi; ate their ends.The radially extending arms of the spiders also act as spacers for thedifferent typesof 1 in s which are preferably arranged alternate 31 onthe supporting rods. This same arrangement of'spacing' is carried out inshe engulor spacing of 79 the iffeient types of rings-on the support ingrods. The huh portions of the spiders are keyed so the shefi 7 cool ahu;against each other, thereh sgoecing the ones of the spiiiers the ciesiredistance apart" The up ei cesing S'is provided with a h 'eekei 'jpcte15; and the iowei' casing 4 supports zhe grindin concave 16" and gratebars 1'? in close proximicy'to the paths of the outermost portions ofthe rings-carried by file rods 53; The grinfling concave and grate baresupported at each end on ercuete flanges '18 checrog'ect laterally fromfile side wells off, as iower'cesing. The grinding concave and the gratebars 35 ereciam'peai in piece by meens of screws '19 that engage theupper flanged endsof e1'c'1iete'pieces whose lows? ends bear against theextremities of she reex most grate her. The sides of the grace bars areprovideoi with W lugs 20 that serve to space them epert; end seici grateears are also provided with transverse openings "whereby the puiverisergrate has openings that exceed both longituohneh 1y end crensvereeiy, I

The rear end of she lower casing of the pulverizer formed with anopening 21 which is provided with a, hinged apron or gate 22 Whose rearwall is inclined &ownwsrdly end reerwerdiy'from the uoper end of em gateand termineifies short of she bottom thereof thereby formin on openinThe gate extends from sideto side 01: the polverizer and is provideciwith end Wells hose: upper portions overlap the rear edge portionof ciaosioiesof the pulverizer anciwhose Flower portions ere momgt'ecion-horizoneei pivots Wisflpporteci in blockeigs 25 secured to the heckof theccsing ed jacenc techie opening therein, whereby saici 1m getsmicpbed foryei'ticei swinging move meek toward and owe fromthepuiverieerc Angular brackets 26 have one arm riveted or otherwiserigidly secured to the end walls of the gate or hinged apron 22. Theother arm of each bracket extends forwardly along side of each side wallof the casing and is provided with a series of counter-weights 25 whichhave a-ftounterbalancing eft'ect on the gate and thereby serve toyieldably hold said gate in an upright or closed position againstthelower casing 4. By this arrangement, the swinging of one or more ofthe fingers produces an opening for the discharge of the foreign matter,some of which will pass out through the opening 21. \Vhen large piecespass through the finger openings and lodge, the gate 22 is swung open atthe top and such lodged pieces are lifted out by means of tongs or othersuitable means.

Extending through slots 27 provided therefor in the free upper end ofthe swinging apron 22 is a series of horizontally spaced levers 28.These levers are fulcrumed between their ends on pins 29 located inthcslots in the hinged apron. The forwardly extending arms of the apronproject into the pulverizer and are curved downwardly in close proximityto the paths of the outcrn'iost. portions of the rings and.

thus constitute a grate section whose bars are independently yieldablc.The outer arms of said levers project rearwardly and are provided withcounter-weights 30 which have a counter-balancing effect on said leversand thus tend to swing the inner arms thereof towards the rings.

The inner arms of the levers 28 are adapted to be moved towards and awayfrom the rings by means of adjusting screws 31 which are threaded intothe hinged apron 'and engage the under sides of the outer arms of saidlevers. These screws serve also as adjustablestops for limiting theswinging movement of the inner arms of the levers in the direction ofthe rings. The amount of pressure required to overcome thecountcr-balancing effect of the weights on the outer arms of the leversor fingers is controlled by adjusting the slidably mountedcounter-weights longitudinally of their supporting rods. Thecounter-weights are provided with screws 32 and are thus adapted to belocked in the desired adjusted position.

In the event that foreign material. such as pieces of metal or otherexceedingly hard substances are fed into the pulvcrizer, such foreignmaterial is engaged by the rings and carried around to the yicldablcgrate section formed by the curved inner ends of the pivotally mountedlevers or fingers 28 and is thus forced against said fingers; whereuponone or more of said fingers are forced to move an amount sufiicient toform an opening through which such substances,

aeoees are ejected from the grinding area of said pulverizcr and fall tothe bottom thereof.

In the event of overfeeding or oven crowding, the excess *materialcauses an increased pressure on the fingers, thereby causing saidfingers to move an amount sutficicnt to permit the discharge of theexcess material from the grinding area. In the event that the amount ofthe excess matcriai is sufficient to create a pressure on the fingersthat will overcome the counterwe'ighting effect of the counter-weightson the hinged apron, said apron will also swing outwardly a distancecorresponding to the bulk of said excess material, some of which will bedischarged from the pulverizer through the opening 23 in said hingedgate.

It is evident that changes may be made without departing from ourinvention and we do not wish to be limited to the precise constructionshown and described. For instance, if desired, a counter-weighted gratesection may be used instead of the series of independentlycounter-weighted fingers shown and described.

What we claim is:

1. A pnlverizer comprising a casing having a grinding grate and rotaryelements cooperating with said grate, said grinding grate comprising astationary concave and a plurality of fingers at the rear end thercotarran ed to vield under redetermin'ed mssure of material that remainsunground af ter traversing the stationary concave so as to dischargesuch unground material.

2. A pulverizer comprising a casing having a grinding grate and rotaryelements cooperating with said grate, said grinding grate comprising astationary concave and a plurality of fingers arranged adjacent to therear end of said concave for independent yielding movement underpredetermined pressure of material that remains unground aftertraversing the stationary concave so as to discharge such ungroundmaterial:

3. A pulverizer comprising a casing ha ving a grinding grate and rotaryelements cooperating with said grate, said grinding grate comprising astationary concave and a plurality of fingers at the rear end of saidconcave arranged to yield under predeten mined pressure. and means onsaid fingers for varying the pressure under which they will yield.

4. A pulvcrizer comprising a casing having grinding grate androtaryelcments cooperating with said grate, said grate comprising astationary concave and aplurality of' fingers near the rear end thereofarranged to yield under predetermined pressure, means on'said fingersfor varying the pressure under which they will yield, and means foradjusting said fingers towards and away from said rotary elements.

5. A pulverizer comprising a casing hhvoperating with said surfaces, aseries of levels l'iilerumeci. between their ends on said erasing, onearm of e lever being ilisposerl l in cooperative relation with saidrotary elerminezl pro; I means ments to constitute grinding surface,anrl V the preesnre mr '-oii1iter-iw-'; lits mounted on the opposite U;ill yield and means i)? iiiarms of saicl levers for yielclably holdingprl iwzsi" said lingers towa drs saiflfirst mentioned owns of seicllevers in 0; from said rotr eleinentsys'uirl (.rooperative relation. tosaid rotary elements. f means; comprising an efljue" :le ll. Apulverizer comprising a easinghav limiting the movement of said ingzgrinding siirfar'es, rotary elements eo- 1, rs in the direction of qaicla-oziary elements. operating Uitl) said surfaces, a series of i poly:rizer comprising a casing lmv levers fulr-rumeljl between their ends onsaid.

ntling surfaces and rotary elements caning, one arm oi a lever beingdisposed in filing mid surlaets, sili l ETlHileooperative relation withsaid rotary elecomprising a plnrelityof fioments to ronstitnte agrinding surface, their rear Will arranged to yirlrl rouliter-weightsmounted on the opposite tl r prefleterinineil pressure, means on arms ofsairl levers or yielllably holding ire or varying the sure under saidfirst mentioned arms of said levers in 0 l yield, means 1n.indepemlcooperative relation to said rotary elements, llCl lingerstowards and and a stop for limiting the movement of said 'y eleirientsi,Said .i lfirst mentioned arms of said levers in the eonipi air 1;: anadjustab e stop liree'tion of Sillll rotary elements.

-"rxf r (liemoment oi Sflill fingers in 12. A pulverizer comprising aeasing lmv- "ion of sum rotary elements and :1 ing grinding silrfzures,rotary elements eosupport for enizl lingg'er,-- aitl PUP- operating withsaid surfaces, 3 series of allzipleti to yield. iimler :1 prwleleversfulermnecl between their ends on said ress'nre on said lingers. easing,one arm of a lever being disposed in y-izwr of the kind rleserilwl,cooperative relation with said rotary ele- W with a casing having: it,ments to eonstitnte a grinding surface, couni. no Qitilfl of rotarygrinding" elements terqveigbl's mounted on the opposite arms ope 'ei'inowith said grinding grate, said of said levers for ylelrlably holdingsaid ite comprising plurality of first mentioned arms of said levers in.eo'- rigecl i'or yielding;- niovemen't imoperative relation tosaiclrotary elements, in pr euros and automatic bodily and a stop forlimiting the movement of t under pressures greater than the said firstmentioned arms of said levers in required to impart such yielding thedirection of said rotary elements, said t stop being adjustable wherebysaiol first C(I-mlIlNE iOR with a having a be adjusted towarcls and awayfrom said grace fill-l rotary elements cooper rotary elements. xli Reidgrinding grate, said grin4l1 13. A. pulverizer comprising a easing haw Yi 2 8 ll-ionzrry section ing grimiing surfaces rotary elements .:o offingers arranged for inoperating: with sairl surt'aees, said casingbeding movement under certain ing provided with an opening: in its andautomatic jo nt boclily move wall, 2i hinged gate for said opening:cormmes than. the prof ter weig'lits on said rate for yielclablyholclimpart sueli independent ing the same in closed position, 2 seriesof exit. levers fulornmoo between their enrls on seicl 10 Hl2Zi%Tcomprising it casing hevgate, one arm of a lever being disposed in i omirfziees comprising cooperativerelation to said rotary elements mlgrinding ring to constitute a grinding surface, enrl own '1 saidsections and mounted tar-weights on the opposite arms of said a, the Fllevers for yieltlably holding the first new 116 arm 7 tioned arm?)thereof in Poopemtive relation -'li"i'i7 A to saicl rotary el ments.

the proeeoing seetir'ms err Signed at St. Louis, lllissonri, l'lilF; 28%to liscliilrg'e SliCl} imoz'mmcl lay of February, W23

I ll'lili il ST ll. lEEZElViEYEli.

PAUL KLHTTEL a pulverizer oi. the lcincl described, mentioned arms ofsaidlevers are adapted to

